Narrated Rafi bin Khadij: The Messenger of Allah ﷺ forbade earnings of a slave-girl unless it is known from where it came.
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
Benefit:
The owner should be aware of where and how his agents or children are earning and bringing in income, so that there is certainty regarding what is lawful (halal) and pure (tayyib), and so that one can avoid and protect others from what is doubtful or unlawful (haram).
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3427